Lou Jing is attractive, effervescent and has an appealing voice. But these qualities alone would not have made Lou Jing the most famous television talent show contestant in China and the subject of national debate in the world's most populous country. The reason they are talking about Lou is because she is black.

The 20-year-old daughter of a Chinese mother and an African-American father who left the country before she was born, Lou was a highly unusual entrant to Shanghai-based Dragon TV's Go Oriental Angel. Her appearances – she became one of five finalists – have provoked a storm of abuse on the internet, a rare debate on racism in the media, and a bout of self-examination in a country where skin colour is a notoriously sensitive subject.Dragon TV initially had doubts about allowing Lou to perform, but then realised that her presence would do much to attract publicity for the show. But few executives can have expected the fury contained in many of the blogs and online posts that accompanied her performances. The internet is the only place in China where the public can express views with near-freedom – although they are rapidly cut off by an army of state censors if they stray into territory that attracts official disapproval. The huge online interest in Lou clearly does not fall into this category."Ugh. Yellow people and black people mixed together is very gross," was one representative post. And Lou's critics are incensed not only by her colour but also because she is apparently the product of an extramarital relationship. Another blogger wrote: "Numb! This bitch still has the audacity to appear on television! I don't know what to say! One cannot be shameless to this kind of level!"